Jesse Gross 9f9818f8c1 tunnels: Remove encapsulation offloads on decap. ... commit a09a4c8dd1ec7f830e1fb9e59eb72bddc965d168 upstream. If a packet is either locally encapsulated or processed through GRO it is marked with the offloads that it requires. However, when it is decapsulated these tunnel offload indications are not removed. This means that if we receive an encapsulated TCP packet, aggregate it with GRO, decapsulate, and retransmit the resulting frame on a NIC that does not support encapsulation, we won't be able to take advantage of hardware offloads even though it is just a simple TCP packet at this point. This fixes the problem by stripping off encapsulation offload indications when packets are decapsulated. The performance impacts of this bug are significant. In a test where a Geneve encapsulated TCP stream is sent to a hypervisor, GRO'ed, decapsulated, and bridged to a VM performance is improved by 60% (5Gbps->8Gbps) as a result of avoiding unnecessary segmentation at the VM tap interface. Reported-by: Ramu Ramamurthy <sramamur@linux.vnet.ibm.com> Fixes: 68c33163 ("v4 GRE: Add TCP segmentation offload for GRE") Signed-off-by: Jesse Gross <jesse@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> (backported from commit a09a4c8dd1ec7f830e1fb9e59eb72bddc965d168) [adapt iptunnel_pull_header arguments, avoid 7f290c9] Signed-off-by: Stefan Bader <stefan.bader@canonical.com> Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-10-31 04:13:59 -06:00
..
netfilter	netfilter: x_tables: introduce and use xt_copy_counters_from_user	2016-06-24 10:18:24 -07:00
af_inet.c	tunnels: Don't apply GRO to multiple layers of encapsulation.	2016-10-31 04:13:59 -06:00
ah4.c	ah4: Fix error return in ah_input().	2015-08-25 13:38:50 -07:00
arp.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-10-20 06:08:27 -07:00
cipso_ipv4.c	ipv4: coding style: comparison for inequality with NULL	2015-04-03 12:11:15 -04:00
datagram.c	net: Set sk_txhash from a random number	2015-07-29 22:44:04 -07:00
devinet.c	ipv4: Don't do expensive useless work during inetdev destroy.	2016-04-20 15:42:03 +09:00
esp4.c	esp: Fix ESN generation under UDP encapsulation	2016-07-11 09:31:11 -07:00
fib_frontend.c	ipv4/fib: don't warn when primary address is missing if in_dev is dead	2016-05-18 17:06:36 -07:00
fib_lookup.h	ipv4: consider TOS in fib_select_default	2015-07-24 22:46:11 -07:00
fib_rules.c	net: ipv6: use common fib_default_rule_pref	2015-09-09 14:19:50 -07:00
fib_semantics.c	ipv4: reject RTNH_F_DEAD and RTNH_F_LINKDOWN from user space	2016-08-16 09:30:47 +02:00
fib_trie.c	ipv4: panic in leaf_walk_rcu due to stale node pointer	2016-09-30 10:18:34 +02:00
fou.c	tunnels: Remove encapsulation offloads on decap.	2016-10-31 04:13:59 -06:00
gre_demux.c	gre: Remove support for sharing GRE protocol hook.	2015-08-10 14:03:54 -07:00
gre_offload.c	tunnels: Don't apply GRO to multiple layers of encapsulation.	2016-10-31 04:13:59 -06:00
icmp.c	Revert "ipv4/icmp: redirect messages can use the ingress daddr as source"	2015-10-14 06:01:07 -07:00
igmp.c	mld, igmp: Fix reserved tailroom calculation	2016-04-20 15:41:58 +09:00
inet_connection_sock.c	tcp/dccp: fix another race at listener dismantle	2016-03-03 15:07:07 -08:00
inet_diag.c	tcp/dccp: install syn_recv requests into ehash table	2015-10-03 04:32:41 -07:00
inet_fragment.c	net: fix percpu memory leaks	2015-11-02 22:47:14 -05:00
inet_hashtables.c	tcp/dccp: fix hashdance race for passive sessions	2015-10-23 05:42:21 -07:00
inet_lro.c
inet_timewait_sock.c	tcp/dccp: fix timewait races in timer handling	2015-09-21 16:32:29 -07:00
inetpeer.c	net: Add helper function to compare inetpeer addresses	2015-08-28 13:32:36 -07:00
ip_forward.c	net: Pass net into dst_output and remove dst_output_okfn	2015-10-08 04:26:54 -07:00
ip_fragment.c	inet: frag: Always orphan skbs inside ip_defrag()	2016-03-03 15:07:04 -08:00
ip_gre.c	vxlan, gre, geneve: Set a large MTU on ovs-created tunnel devices	2016-06-24 10:18:18 -07:00
ip_input.c	ipv4: Pass struct net into ip_defrag and ip_check_defrag	2015-10-12 19:44:16 -07:00
ip_options.c	ipv4: coding style: comparison for inequality with NULL	2015-04-03 12:11:15 -04:00
ip_output.c	ipv4: only create late gso-skb if skb is already set up with CHECKSUM_PARTIAL	2016-04-20 15:41:57 +09:00
ip_sockglue.c	ipv4: fix memory leaks in ip_cmsg_send() callers	2016-03-03 15:07:06 -08:00
ip_tunnel.c	vxlan, gre, geneve: Set a large MTU on ovs-created tunnel devices	2016-06-24 10:18:18 -07:00
ip_tunnel_core.c	tunnels: Remove encapsulation offloads on decap.	2016-10-31 04:13:59 -06:00
ip_vti.c	vti: flush x-netns xfrm cache when vti interface is removed	2016-09-30 10:18:36 +02:00
ipcomp.c	ipv4: coding style: comparison for equality with NULL	2015-04-03 12:11:15 -04:00
ipconfig.c	ipconfig: send Client-identifier in DHCP requests	2015-10-18 19:23:52 -07:00
ipip.c	ipip: ioctl: Remove superfluous IP-TTL handling.	2015-12-18 16:07:59 -05:00
ipmr.c	ipmr/ip6mr: Initialize the last assert time of mfc entries.	2016-07-11 09:31:11 -07:00
Kconfig	geneve: Consolidate Geneve functionality in single module.	2015-08-27 15:42:48 -07:00
Makefile	tcp: track the packet timings in RACK	2015-10-21 07:00:48 -07:00
netfilter.c	ipv4: Pass struct net into ip_route_me_harder	2015-09-29 20:21:32 +02:00
ping.c	ipv4: fix memory leaks in ip_cmsg_send() callers	2016-03-03 15:07:06 -08:00
proc.c	net: track success and failure of TCP PMTU probing	2015-07-21 22:36:33 -07:00
protocol.c
raw.c	ipv4: fix memory leaks in ip_cmsg_send() callers	2016-03-03 15:07:06 -08:00
route.c	route: do not cache fib route info on local routes with oif	2016-05-18 17:06:35 -07:00
syncookies.c	tcp/dccp: fix hashdance race for passive sessions	2015-10-23 05:42:21 -07:00
sysctl_net_ipv4.c	ipv4: disable BH when changing ip local port range	2015-11-04 21:29:06 -05:00
tcp.c	net:Add sysctl_max_skb_frags	2016-03-03 15:07:05 -08:00
tcp_bic.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_cdg.c	tcp: do not slow start when cwnd equals ssthresh	2015-07-09 14:22:52 -07:00
tcp_cong.c	tcp: remove tcp_ecn_make_synack() socket argument	2015-09-25 13:00:38 -07:00
tcp_cubic.c	tcp_cubic: do not set epoch_start in the future	2015-09-17 22:35:07 -07:00
tcp_dctcp.c	tcp: allow dctcp alpha to drop to zero	2015-10-23 02:46:52 -07:00
tcp_diag.c	tcp: ensure proper barriers in lockless contexts	2015-11-15 18:36:38 -05:00
tcp_fastopen.c	tcp/dccp: fix hashdance race for passive sessions	2015-10-23 05:42:21 -07:00
tcp_highspeed.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_htcp.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_hybla.c	tcp: do not slow start when cwnd equals ssthresh	2015-07-09 14:22:52 -07:00
tcp_illinois.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_input.c	tcp: enable per-socket rate limiting of all 'challenge acks'	2016-08-16 09:30:47 +02:00
tcp_ipv4.c	tcp: properly scale window in tcp_v[46]_reqsk_send_ack()	2016-09-30 10:18:34 +02:00
tcp_lp.c
tcp_memcontrol.c	memcg: cleanup static keys decrement	2015-02-12 18:54:10 -08:00
tcp_metrics.c	tcp: convert cached rtt from usec to jiffies when feeding initial rto	2016-04-20 15:41:56 +09:00
tcp_minisocks.c	tcp: fix tcpi_segs_in after connection establishment	2016-04-20 15:42:00 +09:00
tcp_offload.c	tcp: reserve tcp_skb_mss() to tcp stack	2015-06-11 16:33:10 -07:00
tcp_output.c	tcp: consider recv buf for the initial window scale	2016-08-16 09:30:48 +02:00
tcp_probe.c
tcp_recovery.c	tcp: use RACK to detect losses	2015-10-21 07:00:53 -07:00
tcp_scalable.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_timer.c	tcp: fix Fast Open snmp over-counting bug	2015-11-20 10:51:12 -05:00
tcp_vegas.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_vegas.h	tcp: prepare CC get_info() access from getsockopt()	2015-04-29 17:10:38 -04:00
tcp_veno.c	tcp: add tcp_in_slow_start helper	2015-07-09 14:22:52 -07:00
tcp_westwood.c	tcp_westwood: fix tcp_westwood_info()	2015-05-05 19:50:09 -04:00
tcp_yeah.c	tcp: cwnd does not increase in TCP YeAH	2016-09-30 10:18:34 +02:00
tunnel4.c
udp.c	udp: properly support MSG_PEEK with truncated buffers	2016-09-15 08:27:49 +02:00
udp_diag.c	sock_diag: specify info_size per inet protocol	2015-06-15 19:49:22 -07:00
udp_impl.h	net: Remove iocb argument from sendmsg and recvmsg	2015-03-02 13:06:31 -05:00
udp_offload.c	tunnels: Don't apply GRO to multiple layers of encapsulation.	2016-10-31 04:13:59 -06:00
udp_tunnel.c	tunnel: Clear IPCB(skb)->opt before dst_link_failure called	2016-04-20 15:41:56 +09:00
udplite.c
xfrm4_input.c	netfilter: Pass net into okfn	2015-09-17 17:18:37 -07:00
xfrm4_mode_beet.c
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c	ipv4: hash net ptr into fragmentation bucket selection	2015-03-25 14:07:04 -04:00
xfrm4_output.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-10-24 06:54:12 -07:00
xfrm4_policy.c	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec	2015-12-22 16:26:31 -05:00
xfrm4_protocol.c
xfrm4_state.c
xfrm4_tunnel.c